A not so typical offest question....
02-09-2006, 09:26 AM
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A not so typical offest question....
Hey Luke!
Here is the deal:
I have a wheel that has a 42mm offset, but is supposed to be 35mm offset. I am almost positive that this means the wheel needs to come "in" 7mm. To do this I am planning on having a reputable machine shop take off 7mm from inside the wheel hub. I want someone to confirm that this is in fact what needs to happen to correct the offset. I would hate to cut some metal off a wheel and then find out I should have added a spacer. See the figure below to see what I am talking about.
Here is the deal:
I have a wheel that has a 42mm offset, but is supposed to be 35mm offset. I am almost positive that this means the wheel needs to come "in" 7mm. To do this I am planning on having a reputable machine shop take off 7mm from inside the wheel hub. I want someone to confirm that this is in fact what needs to happen to correct the offset. I would hate to cut some metal off a wheel and then find out I should have added a spacer. See the figure below to see what I am talking about.
Last edited by Brunelleschi; 02-09-2006 at 09:50 AM.
02-09-2006, 09:28 AM
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For those confused as to why I am chopping up a wheel, the reason is as follows. These wheels are display wheels to be mounted on the car for advertisement purposes. The wheel manufacturer sent the wrong offset on one wheel by mistake. If needs be they will replace the wheel for me, but it will be easier and cheaper for all parties concerned if I can simply correct the issue at a machine shop here in town.
02-09-2006, 04:52 PM
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according to the drawing which Luke has posted and I posted above, for the offset to decrease, the wheel must come in...and for the wheel to come in
02-09-2006, 06:53 PM
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If the wheel you have is ET42, and you need the application to be ET35, you will need a 7mm spacer to make it happen. The higher the offset number, the more the wheels will tuck under. The lower the offset number, the further out the wheels will sit.
Even if the situation were reversed, you cannot shave off more than 3mm from the backpad on predrilled wheels without it getting dangerous. The more you shave, the less material you have between the lug seat and the backpad. The wheel could fail there due to weakening, and if you shave too much, the lugs will go straight through the wheel.
Even if the situation were reversed, you cannot shave off more than 3mm from the backpad on predrilled wheels without it getting dangerous. The more you shave, the less material you have between the lug seat and the backpad. The wheel could fail there due to weakening, and if you shave too much, the lugs will go straight through the wheel.
I was looking at the pic backwards. I got it figured out now! Thanks guys
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02-11-2006, 08:58 AM
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depends on the weather
you need tomove the wheel out not in ..... machining the wheel will increase the offset not decrease it ..... so, your 42 would turn into a 49 if you did that
